BL8549 Description
The BL8549 is a high efficiency current-mode asynchronous, 40V boost converter for LED backlight driving. Its input voltage ranges from 2.5V to 4.5V and it provides an adjustable constant current output decided by the Rset connected to BL8549’s FB pin. The LED brightness can also be controlled by a PWM signal directly set to CE pin, making dimming control very simple.
BL8549 Key Features
- Adjustable Output Voltage, Vfb=0.2V
- Output voltage 40V, driving up to 12 LED string
- Range of operation input voltage: 2.5
- Output Overvoltage Protection @40V
- CE pin PWM direct dimming function
- Line regulation: 0.1%/V (typ.)
- Load regulation: 10mV (typ.)
- High efficiency, up to 90% in driving 10 LEDs
- Environment Temperature: -20C~85C